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Experimental
trials of acclimatization of juvenile Persian sturgeon, Acipenser persicus
to different salinites of 0,5,10, 15ppt were
studied. The juvenile Persian sturgeons in three weight classes (1.5, 3, 5g)
have been transfered from freshwater to different concentrations of saline
water. Na+,
k+, Cl- concentrations
of blood serum and the changes in the number and size of chloride cells were
measured. Na+ concentration
showed an imperceptible trend and K+ concentration
had a decreasing one size of changed chloride cells in different
salinities were 8.6-13
±
0.3 mm
and their numbers were (25-65±3)
in 5 pairs of fillaments. The results revealed that salinity tolerance was
increased with the fish size. According to this study, there is a direct
relation between the number and size of chloide cells and salinities and time
exposure.